Polymeric organosiloxanes



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POLYMERIC ORGANOSILOXANES Loren A. Haluska, Midland, Mich., assignor to Dow Corning Corporation, Midland, Mich., a corporation of lVIichigau No Drawing.

Application August 9, 1956 Serial No. 603,174

4 Claims. (Cl. 260448.2)

This invention relates to organosiloxanes in which some of the silicon atoms are connected by organic ether groups.

It is the object of this invention to provide novel compositions of matter which are useful as cosmetic additives, lubricants for organic fibers and as surface active agents. Other objects and advantages will be apparent from the following description.

This invention relates to organosiloxanes of the unit formula in which R is a saturated hydrocarbon or aromatic hydrocarbon radical or a halogenated saturated hydrocarbon or halogenated aromatic hydrocarbon radical, R is an alkylene radical of at least 2 carbon atoms, m has an I average value from to 2 inclusive, and n has a value of at least 1.

The polymeric materials of this invention can be prepared by reacting a dialkenyl ether of a glycol or a polyglycol with a silane of the formula R SiI-ICl in the presence of a catalyst such as chloroplatinic acid or plati- This reaction is best carried out by heating a mixture of the reactants and the catalyst at a .temperature from 50 to 150 C. whereby addition of the SiH compound to the double bond. of the alkenyl group of the ether takes place. The resulting chlorosilanes can then be hydrolyzed in the conventional manner to give the siloxanes of this invention.

Alternatively the compositions can be prepared by reacting a siloxane containing a hydrogen atom bonded to each Si atom. In all cases the number of SiH groups should be at least equal to the number of alkenyl groups in the glycol ethers. It should be understood that a mixture of two or more SiI-I compounds and/ or two or more glycol ethers can be employed in the reaction.

For the purpose of this invention R can be any saturated aliphatic hydrocarbon radical such as alkyl radicals such as methyl, ethyl, butyl, isobutyl, hexyl, or octadecyl; any saturated cycloaliphatic hydrocarbon radical such as cyclohexyl and cyclopentyl; any aromatic hydrcarbon radical such as phenyl, xenyl, naphthyl and tolyl and any aralkyl hydrocarbon radical such as benzyl and S-phenylethyl; any halogenated saturated hydrocarbon radical such as chlorotrifiuorocyclobutyl, trifluoropropyl, dichloro-.

cyclohexyl, monochlorocyclopentyl and tetrafiuoroethyl and any halogenated aromatic hydrocarbon radical such as chlorophenyl, bromoxenyl, and a,oc,a-llifill0l'0t0lyl.

It should be understood that the various R groups on each silicon atom can be the same or different and the heated to remove the solvent and excess disiloxane.

2,888,824 Pate nted Jan. 13, 1959 ICC . 2 should be understood that the various R radicals within any given polymer unit can be the same or different.

This invention also relates to copolymers of from .1 to 99.9 mol percent siloxane units of the formula in which R, R, m and n are as above defined and from .1 to 99.9 mol percent siloxane units of the formula Rm R2 O. SiRORORSlO.a

can be interacted with a cyclic siloxane of the formula (R" SiO) in the presence of potassium hydroxide.

A third method for preparing the copolymers of this invention is that of interacting the dialkenyl ethers of the glycol or polyglycols with -a copolymeric siloxane in which some of the silicon atoms contain silicon bonded hydrogen atoms. This reaction is best carried out by heating a mixture of the reactants at from 50 to C. in the presence of a platinum catalyst.

Silanes of the formula R SiHCl in which R is a halogenated hydrocarbon radical are best prepared by reacting the corresponding Grignard reagent with trichlorosilane.

The following examples are illustrative only and should not be construed as limiting the invention which is properly delineated in the appended claims.

Example 1 A mixture'of 159.2 g. of the divinyl ether of diethylene glycol, 441.8 g. ofPhMe siosiHMe 3 g. of a'.35% solution of chloroplatinic acid in dimethyl carbitol and 200 ml. of toluene was heated at a temperature of from 137 to 138 C. for 18 hours. The reaction product was The distillation residue amounted to 554.9 g. of a fluid having the formula Meg lvilez hyie Me PhSlOSiOHzCI-BO(OH OHQO)zCHzCHzSiOSiPh having a viscosity at 25 C. of 14.85 cs. and a refractive index at 25 C. of 1.4833.

Example 2 169.3 g. of tetramethyldisiloxane were added over a period of 4 hours and 47 minutes to a solution of 199.6 g. of the divinyl ether of diethylene glycol, 3 g. of the catalyst of Example 1 and 200 ml. of toluene. During addition of the siloxane the temperature ranged from 60 to 63 C. After addition was complete the mixture Was heated at 120.5 C. for an additional 2 hours and 38 minutes. The product was then stripped of volatiles by heating to 198.5 C. at .5 mm. There was obtained 336.1 g. of a fluid product which was a polymeric siloxane of the unit formula This siloxane had a viscosity at 25 C. of 620 cs. and a refractive index at 25 C. of 1.4550.

Example 3 When the following dialkenyl glycol ethers are reacted in the proportions shown with the following silanes in the manner of Example 2 and the addition products are 2. A polymeric orgauosiloxane having the unit formula Mei Mez 0,5SlCH2CHzO (CHzCHaOhCHzCHzSiOJ hydrolyzed in the conventional manner, siloxanes having 5 the following unit formulae are obtained: Where Me P The methyl fadlcflL Mols Ether Silane Mols Siloxane unit formula Ether Silane 1 CHQ=CHCH O(G112)1sOCH2CH-=CH2 1381013 2 3/2 B)3 9)18 2)3SlO3/2 P h P h 1 CHz:CH(CHg)m(OCHzCH2)1o0CH=OH2 PhSiHClz 2 2)1t(OOH2CH2)10O(CH2)2S Me CnHavSiHClz 1 l QisHu Me QQHH 1 CH,=oH 0 ,0 3 =OH, OfiHnSlHClZ 1 osmcHmocHcmo(cHmsio Ce 4 eHs C6H4C6H5 1 CH=CHOGH2CH2OCH=CH2 CQHC5H4S1HC12 2 OSl OH2)2OCHzOH20(CH2)2SiO I CH3OuH4SiHC12 1 ?a 4 Ha 043E401 1 011:0110 CH (3H 0 01 1:0112

2 2 2 )5 8 OICBHASiHClZ 1 osiwHnzo omomomwmnsio CFSOH2CH2S1HC12 1 CH2C 2CFs 1 CH =CHOCHzCH2OCH=CHg QGHAGFS CFzCaH-gSlHClg 1 OSKOHQMO CHgCHgO (CH2):S1O

Example 4 3. A copolymeric siloxane comprising from .1 to 99.9 mol percent siloxane units of the formula When the corresponding chlorosilanes are cohydrolyzed R R in the conventional manner, the following siloxane co-'- polymers are obtained: 0(R ii 2 2 Me Me in which R 15 selected from the group consisting of 25 mol Percent Q 2 )2(C 2)z saturated monovalent hydrocarbon radicals, aromatic hy- 25 mol percent CH2=CHSlOaI2 Me drocarbon radicals, halogenated saturated hydrocarbon 25 mol percent QFGCHZQHQSiO and radicals and halogenated aromatic hydrocarbon radicals, 25 mol ercent (1106 4 572 R is an alkylene radical of at least 2 carbon atoms, In M (2) M has an average value from -0 to 2 inclusive and n has a e e 25 molpercent OSKOHMO(cHzcmohwHmsio value of at leastl and from .1 to 999 mol percent SllOX- 25 mol percent CsHuSlOa/z ane units of the formula Me 25 mol percent CflH4CH2SlO a: 4 x 15 mol percent 0 F3CH4Si0m 40 T 5 mol percent QraHuSiOs/m and 5 mol percent S102 in which R is selected from the group consisting of Th hi h i l i d i monovalent hydrocarbon radicals and halogenated mono- 1. A polymeric organosiloxane having the unit formula Valent Y Q Q Tadlcals x has an average Value R R from 0 to 3 inclusive. m m 4. A siloxane of the formula O SiRO(RO),,RSiO

l Meg Mfez luez M02 2 2 PhSiOSiOH-zCHzO(OHgCHzOhCHzOHzSiOSiPh in which R is selected from the group consisting of Where Ph represent the methyl and P y radisaturated hydrocarbon radicals, aromatic hydrocarbon 0315 p yradicals, halogenated saturated hydrocarbon radicals and halogenated aromatic hydrocarbon radicals, R is an alkylene radical of at least 2 carbon atoms, m has an average value from 0 to 2, and n has a value of at last 1.

References Cited in the file of this patent Journal of Polymeric Science, vol. 8, No. 3, page 259. (Copy in Division 60.)

UNITED STATES PATENT OFFICE Certificate of Correction Y Patent No. 2,868,824 January 13,1959 Loren A. Haluska It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 2, line 24, for that portion of the formula reading R read -R Signed and sealed this 28th day of April 1959.

Attest: T. B. MORROW, Attesting Ofiicer.

ROBERT C. WATSON, aommz'ssz'omr of Patents. 

1. A POLYMERIC ORGANOSILOXANE HAVING THE UNIT FORMULA 